IA611

Datasheet

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10

Figure 4

Memory Pool Structure

2.1.5 Audio Interfaces

The IA611 audio processor supports the following transfer of audio data:



Master/Slave I2S/TDM.



Two PDM output channels.

Digital Microphone PDM Output Interface

The IA611 has a single PDM output signal that can be used to transmit two audio channels. The data for one

of the two audio channels is transmitted on each clock edge, as shown in Figure 5. In PDM output mode, the

clock can be configured as input (slave) or output (master). If it is programmed as input, Table 2 lists the

supported frequency ranges. If the clock is configured as output, the default output frequency is set to

3.072 MHz. For details, see the IA61x API Guide for flexibility on using PDM clock as an output.

Figure 5

PDM Two-Channel Output Timing

Table 2 Supported PDM Clock Rates

PDM Clock (kHz)

Recommended Max Bandwidth

of Audio Signal (kHz)

512

8

768

8

1024

10.66

1536

16

2048

21.33

2400

25

3072

32

4608

48

4800

50